<template>
  <div id="equip-tree">
    <el-tree
      :props="props"
      :load="loadNode"
      lazy
      show-checkbox
      @check-change="handleCheckChange"
    >
    </el-tree>
  </div>
</template>
<script>
import "../../assets/equipTree.css";
export default {
  name: "equipTree",
  components: {},
  props: {},
  data() {
    return {
      props: {
        label: "name",
        children: "zones",
      },
      count: 1,
    };
  },
  computed: {},
  watch: {},
  created() {},
  mounted() {},
  methods: {
    handleCheckChange(data, checked, indeterminate) {
      console.log(data, checked, indeterminate);
    },
    handleNodeClick(data) {
      console.log(data);
    },
    loadNode(node, resolve) {
      if (node.level === 0) {
        return resolve([{ name: "region1" }, { name: "region2" }]);
      }
      if (node.level > 3) return resolve([]);

      var hasChild;
      if (node.data.name === "region1") {
        hasChild = true;
      } else if (node.data.name === "region2") {
        hasChild = false;
      } else {
        hasChild = Math.random() > 0.5;
      }

      setTimeout(() => {
        var data;
        if (hasChild) {
          data = [
            {
              name: "zone" + this.count++,
            },
            {
              name: "zone" + this.count++,
            },
          ];
        } else {
          data = [];
        }

        resolve(data);
      }, 500);
    },
  },
};
</script>
<style scoped></style>
